Hi, I'm just wondering what the difference between the two are in terms of how they look.The reason I ask is because I noticed a sort of dark spot on my shaft after jelqing one day.I took about two weeks off and it is still there.I don't think it is a bruise because there is no pain and I got it after a regular jelqing session.It also disappears when I get an erection.Im experiencing mostly positive Pi's except for the dark spot.Im also getting a sort of "tingling" sensation somtimes after I get an erection , I wouldn't call it pain but maybe a little soreness? It only last maybe a second probly less.I am planning on taking another week or two off for safety reasons but If it is just discoloration I don't want to be waiting for ever.( I read that discoloration can sometimes take months).If anyone can offer some knowledge it would be greatly appreciated.Thanks!